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126 - 150 of 1229 Items << < 1 2 3 4 5 6 7 8 9 10 > >>
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In January-February 1971 five replicate 0.07 m² Van Veen grabs
were obtained from each of 12 stations in Arthur Harbor and nine Van
Veen grabs were obtained from two stations in nearby Bismark Strait.
The 69 grab samples yielded 78,395 individuals...
1976-07-21 (iso8601)
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"Annual report" - T.p. verso
2024-05-01
2005-06-14 2005-04-01 |
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Knowledge of stand structure, stand dynamics, and production ecology of
species mixtures lags well behind that of single-species, even-aged stands. Two
mixed-species spacing trials in central Oregon allowed investigation of mixed-species
dynamics...
2002-09-05 (iso8601)
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Seven sites of uniform topography and soil were selected within
a self perpetuating ponderosa pine forest found on the eastern
flank of the central Oregon Cascades. These plots were located along
a vegetational gradient caused mainly by an...
1967-02-14 (iso8601)
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I surveyed epiphytic macrolichens and bryophytes in six stands in each of
seven riparian stand types in the Oregon Coast Range. This study (Chapter 2)
describes the association of epiphytes with stand types and the corresponding
potential of...
2000-10-06 (iso8601)
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Species distribution models are frequently used in ecology to predict the spatial and temporal occurrence of organisms. Direct interpretation of these models assumes that the relationships between the organisms and their environment are...
2014-05-01
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"November 2002"; 66 p. in various paginations: ill., form -- Executive summary ([6]p.)
2024-05-01
2007-11-30 2005-08-15 |
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During 1969-1971 I studied patterns of resource allocation and
behavioral interaction among Brandt's Cormorants, Pelagic Cormorants,
Common Murres and Pigeon Guillemots in the area of a breeding
colony on Yaquina Head on the central Oregon coast....
1973-04-24 (iso8601)
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Groundfish surveys off the Washington coast were conducted in September of 1975
and 1976 between Cape Flattery and the Columbia River. The primary purposes of the surveys were to obtain estimates of biomass and further our knowledge on population...
1977-09 (iso8601)
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The black grass bug genus Irbisia Reuter was revised. Over 18,000
specimens were examined and information concerning the biology, host
plant and distributional relationships of the species was compiled.
In addition to external characters, the male...
1981-03-18 (iso8601)
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Understory vegetation in artificially created tree canopy gaps in the Pacific
Northwest was studied to determine 1) variation in understory vegetation cover
between gap edges and gap centers, as well as between control and treatment plots,
2)...
1999-02-12 (iso8601)
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Ecology of shortnose and Lost River suckers in Tule Lake National Wildlife Refuge,
California, Progress Report, April - November 1999
Lisa A. Hicks, U. S. Fish and Wildlife Service, Klamath Basin National Wildlife Refuge, Route
1, Box 74,...
2024-05-01
2005-07-19 2005-06-02 |
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Papers,
photographs, and other media materials of a Democratic Congressman and Senator
from Washington State.; Early years: Henry Martin Jackson was born in Everett, Washington, in
1912, the son of Norwegian immigrants. His sister gave...
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Ninety-one species of birds were surveyed in grass/forb, early and late shrub/sapling, pole, and medium sawtimber stages of young-growth Douglas-fir in northwestern California; patterns of bird distribution and abundance were related to habitat...
1984-11-20 (iso8601)
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The number of endangered species is rapidly increasing while paucity of adequate information and resources delays establishment of conservation actions. The IUCN’s listing system is insufficient to determine conservation priorities and many...
2010-03-02 (iso8601)
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Small remnants of 'natural' habitats exist today throughout much of the world. Upland
prairies in the Willamette Valley, Oregon have been nearly eliminated by conversion to
agriculture and other uses. As a result, very few prairies remain and at...
2002-11-01 (iso8601)
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The purpose of this summary report is to provide an overview of the findings developed for the Lower Snake River Juvenile Salmon Migration Feasibility Study. For more detailed information, the reader should refer to the Draft Feasibility...
1999-05-01
2004-12-14 2004-11-04 |
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Because forest ecosystems have the capacity to store large quantities of carbon
(C), there is interest in managing forests to mitigate elevated CO[subscript 2] concentrations and
associated effects on the global climate. However, some mitigation...
2013-09 (iso8601)
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The genus Ochodaeus Serville contains approximately sixty
species and is World wide in its distribution. One-half of these
species are known from the Nearctic and Neotropic regions.
Adults of six previously described species common to the
United...
1973-05-07 (iso8601)
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A biosystematic investigation was undertaken in 15
species and three subspecies of the genus Aster, in western
North America. Previous studies had been based entirely on
external morphological features, and it was believed that
much could be...
1966-05-10 (iso8601)
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The purpose of this study was to describe the life cycles,
feeding ecology, and habitat use of western species in the mayfly
family Ephemerellidae. Data were used to compare the ecological
relationships and strategies among species and to examine...
1982-07-23 (iso8601)
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A study of the distribution, relative abundance and diet of
fishes sympatric with juvenile sockeye salmon, Oncorhynchus nerka
(Walbaum), within the freshwater nursery areas of the Naknek River
system was undertaken from 1961 to 1963. The study was...
1968-09-20 (iso8601)
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Records
documenting the administration and research projects of the Applied Fisheries
Laboratory, the Laboratory of Radiation Biology, and the Laboratory of
Radiation Ecology at the University of Washington.; The Applied Fisheries...
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